Last, the temperature contraction coefficient and dry shrinkage coefficient of porous concrete are advanced.
得出多孔混凝土的温缩系数和干缩系数。
Temperature contraction coefficient is a parameter for material expansion and contract property when temperature becomes high ot low.
温度收缩系数是反映材料热胀冷缩特性的参数，贫砼基层材料的温缩特性又直接影响到温度应力。
Because of the always-outdated statistical data in the calculation of GDP contraction coefficient currently, we still adopt CPI indicators to measure the degree of inflation.
由于GDP紧缩系数的计算还存在统计数据滞后的问题，因此，我国通货膨胀的衡量目前仍采用CPI指标。
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